MESON Chess Problem Database
Problem Display
PID: 236486 (4r3/1Q6/2n2P2/p2p2p1/1bPPkNP1/2pp2p1/2b3Pr/KBN2RB1 w - - 0 1)
Bourd, Evgeny
Nevo, Itzhak
Variantim, 2018
#2
12 + 12
SOLUTION
- SOUND
- Sets
- 1...Rxg2
- 2.Qh7#
- 1...Rh7
- 2.Qxh7#
- 1...Bd1
- 2.Bxd3#
- 1...Bb3
- 2.Bxd3#
- 1...Ba4
- 2.Bxd3#
- 1...Sxd4
- 2.Qxd5#
- 1...Se5
- 2.Qxd5#
- 1...Sa7
- 2.Qxd5#
- 1...Sb8
- 2.Qxd5#
- 1...Sd8
- 2.Qxd5#
- 1...d2
- 2.Bxc2#
- 1...dxc4
- 2.Qxc6#
- 1...gxf4
- 2.Re1#
- 1...Rxg2
- Tries
- 1.Sce2?
- threat
- 2.Sxg3#
- 1...Rxg2
- 2.Qh7#
- 1...Sxd4
- 2.Qxd5#
- 1...dxe2
- 2.Bxc2#
- 1...gxf4
- 2.Rxf4#
- 1...Rh3!
- threat
- 1.Scxd3?
- threat
- 2.Re1#
- 1...Rxg2
- 2.Qh7#
- 1...Bxd3
- 2.Bxd3#
- 1...Sxd4
- 2.Qxd5#
- 1...Bd1
- 2.Sc5#
- 1...gxf4!
- threat
- 1.Sfe2?
- threat
- 2.Sxg3#
- 1...Rxg2
- 2.Qh7#
- 1...Sxd4
- 2.Qxd5#
- 1...dxe2
- 2.Bxc2#
- 1...dxc4
- 2.Qxc6#
- 1...Bd6
- 2.Sxc3#
- 1...Rh3!
- threat
- 1.Sh3?
- threat
- 2.Sxg5#
- 2.Re1#
- 2.Qh7#
- 1...Rxg2
- 2.Sxg5#
- 2.Qh7#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qxc6#
- 1...Re5
- 2.Re1#
- 1...Re7
- 2.Sxg5#
- 2.Re1#
- 1...Rg8
- 2.Re1#
- 1...Rh8
- 2.Sxg5#
- 2.Re1#
- 1...Bd1
- 2.Sxg5#
- 2.Bxd3#
- 2.Qh7#
- 1...Be7
- 2.Sxg5#
- 2.Re1#
- 1...Se5
- 2.Sxg5#
- 2.Re1#
- 2.Qxd5#
- 1...Se7
- 2.Sxg5#
- 2.Re1#
- 1...d2
- 2.Sxg5#
- 2.Bxc2#
- 2.Qh7#
- 1...Rxh3!
- threat
- 1.Sxd5?
- threat
- 2.Re1#
- 1...Rxg2
- 2.Qh7#
- 1...Bd1
- 2.Bxd3#
- 1...d2
- 2.Bxc2#
- 1...Sxd4!
- threat
- 1.Sh5?
- threat
- 2.Sxg3#
- 2.Re1#
- 2.Qh7#
- 1...Rxg2
- 2.Qh7#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qxc6#
- 1...Rh3
- 2.Re1#
- 2.Qh7#
- 1...Re5
- 2.Sxg3#
- 2.Re1#
- 1...Re7
- 2.Sxg3#
- 2.Re1#
- 1...Rg8
- 2.Sxg3#
- 2.Re1#
- 1...Rh8
- 2.Sxg3#
- 2.Re1#
- 1...Bd1
- 2.Sxg3#
- 2.Bxd3#
- 2.Qh7#
- 1...Bd6
- 2.Re1#
- 2.Qh7#
- 1...Be7
- 2.Sxg3#
- 2.Re1#
- 1...Se5
- 2.Sxg3#
- 2.Re1#
- 2.Qxd5#
- 1...Se7
- 2.Sxg3#
- 2.Re1#
- 1...d2
- 2.Sxg3#
- 2.Bxc2#
- 2.Qh7#
- 1...Rxh5!
- threat
- 1.Se6?
- threat
- 2.Sxg5#
- 2.Re1#
- 1...Rxg2
- 2.Sxg5#
- 2.Qh7#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qxc6#
- 1...Rh5
- 2.Re1#
- 1...Rg8
- 2.Re1#
- 1...Bd1
- 2.Sxg5#
- 2.Bxd3#
- 1...d2
- 2.Sxg5#
- 2.Bxc2#
- 1...Rxe6!
- threat
- 1.Sg6?
- threat
- 2.Re1#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qxc6#
- 1...Bd1
- 2.Bxd3#
- 1...d2
- 2.Bxc2#
- 1...Rxg2!
- threat
- 1.Bxc2?
- threat
- 2.Bxd3#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qxc6#
- 1...Se5
- 2.Qxd5#
- 1...dxc2!
- threat
- 1.Qxc6?
- threat
- 2.Qxd5#
- 1...Rd8
- 2.Qe6#
- 1...Re5!
- threat
- 1.Qd7?
- threat
- 2.Qf5#
- 2.Qxd5#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qf5#
- 2.Qxc6#
- 2.Qd5#
- 1...Re6
- 2.Qxd5#
- 1...Rd8
- 2.Qf5#
- 1...Bd6
- 2.Qf5#
- 1...Se7
- 2.Qe6#
- 1...Re5!
- threat
- 1.Qf7?
- threat
- 2.Qxd5#
- 2.Qg6#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qd5#
- 2.Qg6#
- 1...Rh6
- 2.Qxd5#
- 1...Re6
- 2.Qg6#
- 1...Rd8
- 2.Qg6#
- 1...Rg8
- 2.Qxd5#
- 1...Se5
- 2.Qxd5#
- 1...Se7
- 2.Qe6#
- 1...Re5!
- threat
- 1.Sce2?
- Keys
- 1.Sfxd3!
- threat
- 2.Re1#
- 1...Rxg2
- 2.Qh7#
- 1...Bxd3
- 2.Bxd3#
- 1...Sxd4
- 2.Qxd5#
- 1...dxc4
- 2.Qxc6#
- 1...Bd1
- 2.Sc5#
- threat
- 1.Sfxd3!
FEATURES
- Static
- TYPE = THREAT
- CHANGED MATES = 1
- ADDED MATES = 1
- REMOVED MATES = 9
- Sets
- R(b);N_GUARD,XP(F)::QAB(L)
- R(b);N_GUARD::QAB(L),XR(b)
- B(a);OGATE,P_SPINP(d)::B(B),XP(d)
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- S(k);OGATE,P_SPINP(i)::QAB1(L),XP(i)
- P(d);OGATEB,P_SPINB(a)::B(B),XB(a)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- P(j);SBLOCK,XS(I)::R(D)
- Tries
- Try
- S(C);
- Threat
- S(C),XP(e)
- Vars
- R(b);N_GUARD,XP(F)::QAB(L)
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- P(d);OGATEB,P_SPINB(a),XS(C)::B(B),XB(a)
- P(j);OGATE,XS(I)::R1(D),XP(j)
- Refutation
- R(b);
- Try
- S(C);XP(d)
- Threat
- R(D)
- Vars
- R(b);N_GUARD,XP(F)::QAB(L)
- B(a);OGATE,P_SPINB(a),XS(C)::B(B),XB(a)
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- B(a);::B(B)+S(C),DCHECK
- Refutation
- P(j);XS(I)
- Try
- S(I);
- Threat
- S(I),XP(e)
- Vars
- R(b);N_GUARD,XP(F)::QAB(L)
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- P(d);OGATEB,P_SPINB(a),XS(I)::B(B),XB(a)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- B(f);N_GUARD::S(I),XP(c)
- Refutation
- R(b);
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- R(l);::R(D)
- Refutation
- R(b);XS(I)
- Try
- S(I);XP(i)
- Threat
- R(D)
- Vars
- R(b);N_GUARD,XP(F)::QAB(L)
- B(a);OGATE,P_SPINP(d)::B(B),XP(d)
- P(d);OGATEB,P_SPINB(a)::B(B),XB(a)
- Refutation
- S(k);XP(H)
- Try
- S(I);
- Threat
- DUALS(3)
- Vars
- R(b);XP(F)::QAB(L)
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- Refutation
- R(b);XS(I)
- Try
- S(I);
- Threat
- DUALS(2)
- Vars
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- R(b);::R(D)
- R(l);::R(D)
- Refutation
- R(l);XS(I)
- Try
- S(I);
- Threat
- R(D)
- Vars
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- B(a);OGATE,P_SPINP(d)::B(B),XP(d)
- P(d);OGATEB,P_SPINB(a)::B(B),XB(a)
- Refutation
- R(b);XP(F)
- Try
- B(B);P_PINP(d),XB(a)
- Threat
- B(B),XP(d)
- Vars
- S(k);OGATE,XP(H)::QAB1(L),XP(i)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- S(k);OGATE::QAB1(L),XP(i)
- Refutation
- P(d);N_SPINP(d),XB(B)
- Try
- Q(L);P_PINP(i),XS(k)
- Threat
- QAB1(L),XP(i)
- Vars
- R(l);N_GUARD::QAR2(L)
- Refutation
- R(l);
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- S(k);XP(H)::QAB1(L),XP(i)
- R(l);::QAB1(L),XP(i)
- R(l);::QAB1(L)
- B(f);::QAB1(L)
- S(k);N_GUARD,S_CUTR(l)::QAR2(L)
- Refutation
- R(l);
- Try
- Q(L);
- Threat
- DUALS(2)
- Vars
- S(k);XP(H)::QAB1(L),XP(i)
- R(b);::QAB1(L),XP(i)
- R(l);::QAB(L)
- R(l);::QAB1(L),XP(i)
- S(k);::QAB1(L),XP(i)
- S(k);N_GUARD,S_CUTR(l)::QAR2(L)
- Refutation
- R(l);
- Try
- Actual
- S(I);XP(d)
- Threat
- R(D)
- Vars
- R(b);N_GUARD,XP(F)::QAB(L)
- B(a);OGATE,P_SPINB(a),XS(I)::B(B),XB(a)
- S(k);OGATE,P_SPINP(i),XP(H)::QAB1(L),XP(i)
- P(i);OGATEB,P_SPINS(k),XP(G)::QAB(L),XS(k)
- B(a);::B(B)+S(I),DCHECK
Developed and maintained by Brian Stephenson.
Implemented with HTML5, MySQL, Perl (with, inter alia, CGI::Simple, HTML::Template & XML::LibXML) &
CSS/Javascript (jQuery, Bootstrap & DataTables).